Botrytis leaf blight

Names

Scientific Name

Botrytis squamosa

Biology

Description

Botrytis leaf blight can reduce yield and quality of onions dramatically under the right conditions. Lesions begin as small white specks (1 mm to 5 mm in length) with light green to silvery halos on the onion leaf. With proper conditions, spots will spread, eventually killing the whole leaf and dramatically affecting bulb development.